I have a 1995 Ram Regular cab and the hinge pins and bushing are worn out and causeing it to leak I can't find replacement ones does anybody no where I can find them or what I need to do

 

I have the same problem with mine. Whenever I go over bumps, the door shakes like its somewhat open... I can hear the door hitting the striker.

 

I don't know where to purchase the pins and bushings, but I do know it is easy to buy the whole assembly (pins/bushings/hinge) from a junkyard and bolt it on. I did it to my dads truck several years back. Just make sure the junkyard ones are good.

I have also just adjusted the whole assembly with the worn bushings/pins. Mine are kinda worn on my truck and I noticed it when the door started hitting the striker latch. All I did was loosen the bolts on the lower hinge (very slightly), lift the door up a smidgen to where it was lined up and closed properly, and then tightened the bolts back up. It has been working good for the last few years since I did it.